Question

6. Which best describes how a p-n junction operates as a solar cell? a. Incoming photons heat up the semiconductor, thus promoting electrons into the conduction band, leaving behind a hole in the valence band. The junction E-field pushes the electron and hole in opposite directions causing a current to flow. b. Incoming photons are absorbed by an electron near the junction, promoting it from the valence band to the conduction band and leaving behind a hole in the valence band. The junction E-field pushes the electron and hole in opposite directions causing a current to flow. C. Incoming photons strike electrons pushing them in some direction. The diode formed by the junction only allows current to flow in the backward direction, thus producing a net current. d. The photodiode works like a Field effect transistor, with a field provided by EM wave from incoming light, causing the junction to become conducting, causing a current to flow. e. The Electric field in the EM wave pushes electrons back and forth across the junction, but the diode only allows current to flow forward, causing a net current to flow.

Answer 1

B describes best how a P-N junction Operates as Solar cell

In Solar cell Incoming Photons are Absorbed by an electron Near the junction promoting it from the valency band to the conduction band and leaving behind a hole in the valency band.The junction Electric filed pushes the Electron Hole in opposite direction causing a current flow.